Using null expression in condition

[michalparal]

Hi to all,

I have a question about using expression "null" in condition.

I am checking for empty sharepoint column. 
When I use the condition like this, everything works fine and when the field in the sharepoint list is empty, the condition goes true, when there is any value the it goes false. 

But when I try to use the condition like this, it always goes false. Am I geeting it wrong and it could not be used like this? 

I'm checking for multiple columns and I need to find the first one which is empty and put some value in it. I had no problems from the start, but as the number of columns started to grow, I needed to add some condotions and when I tried to use six in row inside IF condotion the Flow stops giving me the options as you can see bellow. So I needed to devide the conditions and that is why I need to use "is not equal to NULL"

Thank you for your advice. 
Michal

[efialttes]

Hi!
I usually have null related problems abd am afraid I have no answer to your question... that's the reason I then to use coalesce() in such circumstances
https://docs.microsoft.com/bs-latn-ba/azure/logic-apps/workflow-definition-language-functions-refere...
Hope this helps

[v-bacao-msft · Accepted solution]

Hi @michalparal ,

I have made a similar test on my side and I don’t encounter the same situation.

Have you used other fields to do a similar test?

Besides, you could use empty() function to check if the field is empty.

Hope this helps.

Best Regards,

[michalparal]

Hi,

thanks a lot, I have been trying to find out what was the problem for 2 days. After you write your answer, I have done some testing and I found out, that in the middle of the flow I had a mistake. So thank you for your response. And also thank for empty function becasuse with it, it works even better.

Thank you,

Michal